Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Objects / FieldDescriptor.cs / 1 / FieldDescriptor.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data.Common; using System.Data.Objects.DataClasses; using System.Data.Metadata.Edm; namespace System.Data.Objects { internal sealed class FieldDescriptor : PropertyDescriptor { private readonly EdmProperty _property; private readonly Type _fieldType; private readonly Type _componentType; private readonly bool _isReadOnly; ////// Construct a new instance of the FieldDescriptor class that describes a property /// on components of the supplied type. /// /// Type of object whose property is described by this FieldDescriptor. /// /// True if property value on component can be modified; otherwise false. /// /// /// EdmProperty that describes the property on the component. /// internal FieldDescriptor(Type componentType, bool isReadOnly, EdmProperty property) : base(property.Name, null) { _componentType = componentType; _property = property; _isReadOnly = isReadOnly; _fieldType = DetermineClrType(_property.TypeUsage); System.Diagnostics.Debug.Assert(_fieldType != null, "FieldDescriptor's CLR type has unexpected value of null."); } ////// Determine a CLR Type to use a property descriptro form an EDM TypeUsage /// /// The EDM TypeUsage containing metadata about the type ///A CLR type that represents that EDM type private Type DetermineClrType(TypeUsage typeUsage) { Type result = null; EdmType edmType = typeUsage.EdmType; switch (edmType.BuiltInTypeKind) { case BuiltInTypeKind.EntityType: case BuiltInTypeKind.ComplexType: result = edmType.ClrType; break; case BuiltInTypeKind.RefType: result = typeof(EntityKey); break; case BuiltInTypeKind.CollectionType: TypeUsage elementTypeUse = ((CollectionType)edmType).TypeUsage; result = DetermineClrType(elementTypeUse); result = typeof(IEnumerable<>).MakeGenericType(result); break; case BuiltInTypeKind.PrimitiveType: result = edmType.ClrType; Facet nullable; if (result.IsValueType && typeUsage.Facets.TryGetValue(DbProviderManifest.NullableFacetName, false, out nullable) && ((bool)nullable.Value)) { result = typeof(Nullable<>).MakeGenericType(result); } break; case BuiltInTypeKind.RowType: result = typeof(IDataRecord); break; default: throw EntityUtil.UnexpectedMetadataType(edmType); } return result; } ////// Get ///instance associated with this field descriptor. /// /// The internal EdmProperty EdmProperty { get { return _property; } } public override Type ComponentType { get { return _componentType; } } public override bool IsReadOnly { get { return _isReadOnly; } } public override Type PropertyType { get { return _fieldType; } } public override bool CanResetValue(object component) { return false; } public override object GetValue(object component) { EntityUtil.CheckArgumentNull(component, "component"); if (!_componentType.IsAssignableFrom(component.GetType())) { throw EntityUtil.IncompatibleArgument(); } object propertyValue; if (component is IEntityWithChangeTracker) //POCO will relax this requirement. { propertyValue = LightweightCodeGenerator.GetValue(_property, component); } else { DbDataRecord dbDataRecord = component as DbDataRecord; if (dbDataRecord != null) { propertyValue = (dbDataRecord.GetValue(dbDataRecord.GetOrdinal(_property.Name))); } else { throw EntityUtil.NotSupported(); } } return propertyValue; } public override void ResetValue(object component) { throw EntityUtil.NotSupported(); } public override void SetValue(object component, object value) { EntityUtil.CheckArgumentNull(component, "component"); if (!_componentType.IsAssignableFrom(component.GetType())) { throw EntityUtil.IncompatibleArgument(); } if (!_isReadOnly && component is IEntityWithChangeTracker) //POCO will relax this requirement { LightweightCodeGenerator.SetValue(_property, component, value); } // if not entity it must be readonly else { throw EntityUtil.WriteOperationNotAllowedOnReadOnlyBindingList(); } } public override bool ShouldSerializeValue(object component) { return false; } public override bool IsBrowsable { get { return true; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //instance associated with this field descriptor, /// or null if there is no EDM property association. /// // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data.Common; using System.Data.Objects.DataClasses; using System.Data.Metadata.Edm; namespace System.Data.Objects { internal sealed class FieldDescriptor : PropertyDescriptor { private readonly EdmProperty _property; private readonly Type _fieldType; private readonly Type _componentType; private readonly bool _isReadOnly; ////// Construct a new instance of the FieldDescriptor class that describes a property /// on components of the supplied type. /// /// Type of object whose property is described by this FieldDescriptor. /// /// True if property value on component can be modified; otherwise false. /// /// /// EdmProperty that describes the property on the component. /// internal FieldDescriptor(Type componentType, bool isReadOnly, EdmProperty property) : base(property.Name, null) { _componentType = componentType; _property = property; _isReadOnly = isReadOnly; _fieldType = DetermineClrType(_property.TypeUsage); System.Diagnostics.Debug.Assert(_fieldType != null, "FieldDescriptor's CLR type has unexpected value of null."); } ////// Determine a CLR Type to use a property descriptro form an EDM TypeUsage /// /// The EDM TypeUsage containing metadata about the type ///A CLR type that represents that EDM type private Type DetermineClrType(TypeUsage typeUsage) { Type result = null; EdmType edmType = typeUsage.EdmType; switch (edmType.BuiltInTypeKind) { case BuiltInTypeKind.EntityType: case BuiltInTypeKind.ComplexType: result = edmType.ClrType; break; case BuiltInTypeKind.RefType: result = typeof(EntityKey); break; case BuiltInTypeKind.CollectionType: TypeUsage elementTypeUse = ((CollectionType)edmType).TypeUsage; result = DetermineClrType(elementTypeUse); result = typeof(IEnumerable<>).MakeGenericType(result); break; case BuiltInTypeKind.PrimitiveType: result = edmType.ClrType; Facet nullable; if (result.IsValueType && typeUsage.Facets.TryGetValue(DbProviderManifest.NullableFacetName, false, out nullable) && ((bool)nullable.Value)) { result = typeof(Nullable<>).MakeGenericType(result); } break; case BuiltInTypeKind.RowType: result = typeof(IDataRecord); break; default: throw EntityUtil.UnexpectedMetadataType(edmType); } return result; } ////// Get ///instance associated with this field descriptor. /// /// The internal EdmProperty EdmProperty { get { return _property; } } public override Type ComponentType { get { return _componentType; } } public override bool IsReadOnly { get { return _isReadOnly; } } public override Type PropertyType { get { return _fieldType; } } public override bool CanResetValue(object component) { return false; } public override object GetValue(object component) { EntityUtil.CheckArgumentNull(component, "component"); if (!_componentType.IsAssignableFrom(component.GetType())) { throw EntityUtil.IncompatibleArgument(); } object propertyValue; if (component is IEntityWithChangeTracker) //POCO will relax this requirement. { propertyValue = LightweightCodeGenerator.GetValue(_property, component); } else { DbDataRecord dbDataRecord = component as DbDataRecord; if (dbDataRecord != null) { propertyValue = (dbDataRecord.GetValue(dbDataRecord.GetOrdinal(_property.Name))); } else { throw EntityUtil.NotSupported(); } } return propertyValue; } public override void ResetValue(object component) { throw EntityUtil.NotSupported(); } public override void SetValue(object component, object value) { EntityUtil.CheckArgumentNull(component, "component"); if (!_componentType.IsAssignableFrom(component.GetType())) { throw EntityUtil.IncompatibleArgument(); } if (!_isReadOnly && component is IEntityWithChangeTracker) //POCO will relax this requirement { LightweightCodeGenerator.SetValue(_property, component, value); } // if not entity it must be readonly else { throw EntityUtil.WriteOperationNotAllowedOnReadOnlyBindingList(); } } public override bool ShouldSerializeValue(object component) { return false; } public override bool IsBrowsable { get { return true; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.instance associated with this field descriptor, /// or null if there is no EDM property association. ///
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- FileSecurity.cs
- FocusManager.cs
- WindowAutomationPeer.cs
- wgx_sdk_version.cs
- OleDbParameterCollection.cs
- BindingEditor.xaml.cs
- TableDetailsRow.cs
- TreeNodeCollection.cs
- StorageConditionPropertyMapping.cs
- SystemWebSectionGroup.cs
- AesCryptoServiceProvider.cs
- NextPreviousPagerField.cs
- HttpFileCollectionWrapper.cs
- HijriCalendar.cs
- DiscoveryMessageProperty.cs
- WpfXamlLoader.cs
- StoreAnnotationsMap.cs
- SafePEFileHandle.cs
- CustomAssemblyResolver.cs
- NativeMethods.cs
- PermissionToken.cs
- ListViewHitTestInfo.cs
- ReaderWriterLock.cs
- EntityUtil.cs
- SqlCacheDependencyDatabase.cs
- TextBoxRenderer.cs
- NameValueSectionHandler.cs
- ErrorTableItemStyle.cs
- NavigationHelper.cs
- StyleBamlTreeBuilder.cs
- BezierSegment.cs
- InputScope.cs
- GeneralTransform3DTo2D.cs
- AutomationPatternInfo.cs
- IpcChannelHelper.cs
- ApplicationProxyInternal.cs
- SegmentInfo.cs
- CultureInfoConverter.cs
- XmlWrappingReader.cs
- BinaryFormatter.cs
- MimeBasePart.cs
- SystemException.cs
- Margins.cs
- ComboBoxRenderer.cs
- SHA1Managed.cs
- FileUpload.cs
- DataBoundLiteralControl.cs
- precedingsibling.cs
- TableCell.cs
- CustomErrorCollection.cs
- OletxEnlistment.cs
- ClientScriptManager.cs
- FloaterBaseParagraph.cs
- DefinitionBase.cs
- XmlObjectSerializerWriteContextComplexJson.cs
- ButtonFlatAdapter.cs
- DbMetaDataColumnNames.cs
- JsonQNameDataContract.cs
- MappingModelBuildProvider.cs
- ApplyTemplatesAction.cs
- SiteMapPath.cs
- EncryptedReference.cs
- ReferentialConstraint.cs
- ApplicationCommands.cs
- HttpBindingExtension.cs
- StylusCaptureWithinProperty.cs
- Point3DConverter.cs
- HtmlHistory.cs
- COMException.cs
- SoapRpcMethodAttribute.cs
- BasicCellRelation.cs
- MsmqBindingFilter.cs
- InternalUserCancelledException.cs
- PaperSource.cs
- ColorConvertedBitmapExtension.cs
- HiddenField.cs
- BevelBitmapEffect.cs
- SyndicationSerializer.cs
- MimeObjectFactory.cs
- ECDiffieHellmanCngPublicKey.cs
- AsyncOperationManager.cs
- LowerCaseStringConverter.cs
- PersonalizationState.cs
- BrowserCapabilitiesCodeGenerator.cs
- PersonalizableTypeEntry.cs
- DataServices.cs
- PageThemeCodeDomTreeGenerator.cs
- HtmlTableCellCollection.cs
- RemoteDebugger.cs
- SymbolPair.cs
- UInt32Storage.cs
- SafeBuffer.cs
- DataGridClipboardHelper.cs
- Vector3D.cs
- ListBase.cs
- StandardToolWindows.cs
- SmtpNetworkElement.cs
- InputLanguageProfileNotifySink.cs
- Grant.cs
- DataServiceResponse.cs